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GitHub.com has fully moved off CSS-in-JS to CSS Modules, resulting in 55% less server-side render time and 25% faster component init. https://github.blog/engineering/architecture-optimization/improving-site-performance-by-shipping-more-css/

github.blogImproving site performance by shipping more CSSHow we fully migrated github.com away from CSS-in-JS.

toni / link

@linkplay.space

good that we all agree now that CSS-in-JS was a mistake 💆

Keith Henry

@k17.dev

Has this fixed CSS-in-JS though? Is it using native `with {type:css}` imports? Without that, surely it's just an extra compile tool so that developers can work with CSS, but the output is still JS?

5/10/26, 11:03 am0 reposts1 like

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